Messages in this thread | | | Date | Mon, 30 Mar 2009 10:44:35 -0400 | From | Mark Lord <> | Subject | Re: Linux 2.6.29 |
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Ric Wheeler wrote: > Mark Lord wrote: >> Ric Wheeler wrote: .. >> The kernel can crash, and the drives, in practice, will still >> flush their caches to media by themselves. Within a second or two. > > Even with desktops, I am not positive that the drive write cache > survives a kernel crash without data loss. If I remember correctly, > Chris's tests used crashes (not power outages) to display the data > corruption that happened without barriers being enabled properly. ..
Linux f/s barriers != drive write caches.
Drive write caches are an almost total non-issue for desktop users, except on the (very rare) event of a total, sudden power failure during extended write outs.
Very rare. Yes, a huge problem for server farms. No question. But the majority of Linux systems are probably (still) desktops/notebooks.
Cheers
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